[llvm] [SLP]Represent externally used values as original scalars, if profitable. (PR #100904)

[Simon Pilgrim via llvm-commits]

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@@ -3,9 +3,9 @@
 
 define void @i64_simplified(ptr noalias %st, ptr noalias %ld) {
 ; CHECK-LABEL: @i64_simplified(
-; CHECK-NEXT:    [[TMP2:%.*]] = load <2 x i64>, ptr [[LD:%.*]], align 8
-; CHECK-NEXT:    [[SHUFFLE:%.*]] = shufflevector <2 x i64> [[TMP2]], <2 x i64> poison, <4 x i32> <i32 0, i32 1, i32 0, i32 1>
-; CHECK-NEXT:    store <4 x i64> [[SHUFFLE]], ptr [[ST:%.*]], align 8
+; CHECK-NEXT:    [[TMP1:%.*]] = load <2 x i64>, ptr [[LD:%.*]], align 8
+; CHECK-NEXT:    [[TMP2:%.*]] = shufflevector <2 x i64> [[TMP1]], <2 x i64> poison, <4 x i32> <i32 0, i32 1, i32 0, i32 1>
+; CHECK-NEXT:    store <4 x i64> [[TMP2]], ptr [[ST:%.*]], align 8
 ; CHECK-NEXT:    ret void
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RKSimon wrote:

please can you precommit / clear out these nfc changes?

https://github.com/llvm/llvm-project/pull/100904